Sheet-metal-scroll cutter



(No Model.)

A. 0.. KITTREDGE.

SHEET METAL SCROLL CUTTER. No. 362,975 Patented May 17, 1887.

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NITE STATES ATENT Fries,

ANSON O. KITTREDGE, OF SLATE HILL, NE\V YORK, ASSIGNOR TO THE VULOAN COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

SHEET-METAL-SCROLL CUTTER.

SPECIFICATION forming part of Letters Patent No. 362,975, dated May 17, 185:7.

A pplieation tiled September 4,1886. Serial No, 312,070. (No model.)

To aZZ whom, it may concern.-

Be it known that I, Anson O. Krrrnnoon, a citizen of the United States, residing at Slate Hill, Orange county,- New York, have invented ccrtain new and useful Improvements in Sheet-MetatScroll Cutters, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to a machine in which a pair of narrow-shearing cutters is continuously operated for the purpose of cutting sheet metal into any form that may be scribed upon its surfacc,the cutters being intentionally made so narrow that they will readily cut the sheet metal on curves of short radius, and being thereby adapted for a variety of scroll-work, such as is required in cornice-making and ornamental sheet-metal work.

The object of my invention is to adapt the cutters to operate at various points within the edge of the sheet, so as to cut out holes that are disconnected with the margin.

Heretofore the cutters have been commonly separated by mechanism requiring the use of theoperators hand, and the lower cutter has been held in a stationary position; and my present improvement intended to furnish a means by which the operator can conveniently move the lower cutter by the use of his knee or foot, thus leaving his hands entirely atliberty to control the application and move ments of the sheet metal. By shifting the lower cutter instead of the upper one, I avoid the necessity of conveying the operators movements around the rear of the goose-neck and the use of means to shift the upper cutter while continuously reciprocating.

The improvement consists, primarily, in the combination, with an upper cutter reciprocated continuously by suitable means, of a lower cutter vertically movable by means located below the cutting-table, so as to separate the cutting-edges by the application of the operators knee or foot.

It is obvious that the location of the cuttershifting mechanism beneath the table adapts it for actuation by either the knee or the foot, the former construction being shown in the drawings for the purpose of illustrating the invention.

' such spindle.

Figure 1 is a side elevation of a machine provided with my improvement. Fig. 2 is a front elevation of the same. Fig. 3 is a plan of the same, the goose-neck of the machine above line m m in Fig. 1 being removed. Fi 1 is a front elevation of the euttershifting mechanism in section on the central line of the cutter-spindle, excepting the lower end of Fig. 5 is a detached plan ol'the cam provided with the knee-levers. Fig. 6 is a detached plan of the removable eanrbed, and Fig. 7 an enlarged view of the front end of the eceentricshaft a.

The body of the machine consists in a bed, A, supported upon legs B, and constructed with a goose-neck, 0, having a movable head, D, mounted in its forward end to carry the upper cutter, 0.

A shaft, a, inserted through the goose-neck, is provided with a pulley, 1), upon its rear end, and an eccentric-sleeve, c, fitted to an eccentric-pin, 0, upon its front end, a, to reciprocate the cutter a continuously with a short and rapid stroke.

F is the cutting-table,provided with an aperture through which a spindle, d,operates vertically, sustaining the lower cutter, e, in the desired relation to the cutter e. The spindle is of dovetail form at itsupper end, thus preventing rotation, and is fitted to a guide, G, in the forward end of the bed A.

The cutter eis clamped'in the upper end of the spindle by a set-screw, c, and the spindle is provided beneath the bed with a fixed cireular cam, II, having inclined seats upon its under side. A bracket, 1, is sustained upon the front leg of the machine below the cam, and supports a movable cam, 9, provided with kncelevers g, by which it may be rotated.

The spindle is made of circular form below the cam H, as at d, and the cam g is fitted to such round part of the spindle and provided upon its upper side with inclined faces g",t0 operate with those upon the under side of the cam H. A block, J, is inserted between the cam g and the bracket I, to permit the lowering of'the spindle to remove the cutters, the block being notched at one side, as at J, to slip past the spindle d, and formed with a rabbct, a, upon its under side, fitted to a similar rabbet upon the top of the bracket I, to hold it in place ICO thereon. The spindle d, being kept from rotation by its fitting in the guide G, is necessarily raised when the cam g is rotated by the inclined surfaces in contact with the cam H,

and as the knee of the operator fits between the two canrlcvers g the movement of the rotary cam may be readily effected in either direction, and the spindle be thus raised or lowered at pleasure. Both the cutters are adjustable vertically in their respective sockets,and are clamped therein by the set-screw e for the lower cutter and the screw a for the upper cutter, the removal of the block J from the bracket I permitting the lower-spindle to drop a considerable distance, and thus separating the cutter so far. that either may be removed from its socket for sharpening.

A rounded seat, 8, is shown applied to the top of the table merely for thepurpose olraising the sheet metal, as shown in Fig. 1, for the convenient application of the operators fingers. When thus used, the seat may be perforated to admit the upper end of the spindle, as shown at d in Fig. 3, and to afford access to the set-screw 6 if located within the table, asshown in Figs. 3 and 4. Such setscrew may, however, be arranged entirely bea low the table, as shown in Fig. 1, and the seat may be formed only with an opening for the passage of the cutter.

As the required movement of the cutter is merely enough to admit the passage of a thin sheet of metal, it is obvious that other mechanical motions may be substituted for a rotary cam to produce the trifling vertical movement required.

The object of the eccentric-sleeved, which directly effects the movement of the cutterhead D, is to vary the stroke of the cutter e, and thus to alter the lap or cut ofthe cutters at pleasure.

The sleeve is secured on the pin 0 by a setscrew, 0, Fig. 7, and may thus be turned around in more or less concentric relations with the eccentric-shaft a.

The longer stroke, when used, is adapted for cutting straight lines or long radius curves with great rapidity, but interferes with the best action of the cutters in turning around small curves,which require less lap of the cutters and consequently a shorter stroke of the I head 1).

I hereby disclaim any subject-matter of my co-pending applications, Nos. 181,311 and 189, 055, which may be shown, but not claimed herein.

WVhat I claim herein is- 1. In a sheet-metalscroll cutter having an upper and lower cutter operating as described, the combinatiomwith a reciprocating upper cutter, of a lower cutter vertically movable toward the upper cutter to bring it into action, and means, as eccentric-sleeve c, for varying the stroke of the movable cutter and the lap of the cutters upon one another, as and for the purpose set forth.

2. In a sheet-metal-scroll cutter having an upper and lower cutter operating as described, the combination,with a reciprocating upper cutter, of a'lower cutter vertically movable toward the upper cutter to bring it into action and provided with means located beneath the table for shifting it vertically by the lower limb of the operator.

3. The combination, with a reciprocating upper cutter, of a Vertically-movable slide or spindle, a lower cutter mounted thereon, a cutting-table arranged about the lower cutter, and means located beneath such table for shifting it vertically by the lower limb ofthe operator.

4. In a sheetmetal-sc'roll cutter, the combination,with a reciprocating upper cutter, of a vertically-movable slide or spindle, a lower cutter mounted thereon, a cutting-table arranged about the lower cutter, a fixed cam upon said spindle, and a movable cam and means for actuating itby the lower limb of the operator, as and for the purpose set forth.

5. In a sheet-metal-scroll cutter, the combi- 9o natiomwith a reciprocating upper cutter, of a vertically-movable spindle, a lower cutter mounted thereon, a cutting-table arranged about the lower cutter, a fixed earn upon said spindle, a bracket upon the frame or leg of- 5 the machine, a rotary cam supported upon such bracket, and levers projected from such cam to embrace the knee of the operator.

. 6. In a sheet-metal-scroll cutter, the combination, with a bed, A, a goose-neck, G, and

legs B, of a reciprocating cutter sustained upon the front end of the goose neck, a vertically-movable spindle fitted to a guide in the front end of the bed A, a cutter mounted in said spindle,'a table arranged about such cut- [05 ter, a circular cam having one or more in clined faces upon its lower side affixed to the spindle, a bracket upon the front leg of the machine below such cam with an opening for the passage of such spindle, and a rotary cam no fitted upon-the spindle and operated upon said bracket and provided with knee-levers, substantially as shown and described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing I15 witnesses.

ANSON O. KITTREDGE. \Vitnes'ses:

JENNIE VAN WYcK, Tnos. S. CRANE. 

